Description of global snow cover maps generated through synergy of
MODIS Terra, MODIS Aqua and AMSR-E Aqua snow products

EOS.yyyyddd_SM


Map projection: lat-lon
Grid size:   0.05 deg both lat and lon
Grid size:  7200 (lon) x 3600 (lat)
Coordinates of the upper left corner of the upper left pixel is 90N, 180W
Orientation: west to east

Files are 1-byte binary (0-255), no header

Meaning of byte values:

0: water
1: snow free land
2: snow, MODIS data used
7: snow: AMSR-E data used

other values: undetermined 

Maps are compressed with linux compress command

File names have the following form:

EOS.yyyyddd_SM      yyyyy is four-digit year, ddd is the day of the year